package com.hmdp.service.impl;

import cn.hutool.json.JSONUtil;
import com.hmdp.dto.Result;
import com.hmdp.entity.ShopType;
import com.hmdp.mapper.ShopTypeMapper;
import com.hmdp.service.IShopTypeService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

import static com.hmdp.utils.RedisConstants.CACHE_SHOP_TYPE_KEY;

/**
 * <p>
 *  服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
public class ShopTypeServiceImpl extends ServiceImpl<ShopTypeMapper, ShopType> implements IShopTypeService {

    @Resource
    private StringRedisTemplate stringRedisTemplate;
    @Override
    public Result queryShopType() {
        Set<String> shopTypeJsonSet = stringRedisTemplate.opsForZSet().range(CACHE_SHOP_TYPE_KEY, 0, -1);
        if (shopTypeJsonSet.size()!=0){
            ArrayList<ShopType> shopTypeList=new ArrayList<>();
            for (String s : shopTypeJsonSet ) {
                shopTypeList.add(JSONUtil.toBean(s,ShopType.class));
            }
            return Result.ok(shopTypeList);
        }
        List<ShopType> typeList = query().orderByAsc("sort").list();
        if (typeList == null||typeList.isEmpty()){
            Result.fail("分类不存在！");
        }
        for (ShopType s : typeList) {
            stringRedisTemplate.opsForZSet().add(CACHE_SHOP_TYPE_KEY,JSONUtil.toJsonStr(s),s.getSort());
        }
        return Result.ok(typeList);
    }
}
